Clutch for backfillers



March 8,- 1932. H. E. SWANSON CLUTCH FOR BACKFILLER S Filed Feb 13, 19294 Sheets-Sheet l H. E. SWANSON CLUTCH FOR BAGKFILLERS March 8, 1-932.1,848,397

F iiled Feb, 13, 1929 4 Sheets-Sheet 2 March 8, 1932. SWANSON 71,848,397

CLUTCH FOR BACKFILLERS.

Filed Feb. 15, 1929 4-Sheets-Sheet 3 H 'lll March 8, 1932. SWANSON1,848,397

} CLUTCH FOR BACKFILLERS "Filed Feb. 13, 1929 4 Sheets-Sheet 4 PatentedMar. 8, 1932 Iceman:

= PAT EN OFFICE 1 imam n. swnnsom ormusxneon'nmenrs, MICHIGAN,ASSIGNORTO AUSTIN' MA- CH NERY. CORPORATION, OF MUs EGQm-MIG IGAN; AconPoRATIoN on'vmemra Mommas Applicatibn fi led February is, 1929;serial no; 339,548. 7

f This invention relates to clutches and has 'more particular reterence'to heavy-duty clutches "which are adapted tobelocked inoperativeiposition' and which have brake members associated therewith insuch a' mannertha't the driven member is held immobile when theclutchisinoperative'. Such clutches are partign la'rly well" adapted foruse mconnectiongwiththe-traction mechanism of heavy duty machines; 7 v[It'is an objectof this invention to prov de a heavy duty clutch inwhich the driving member ispositively locked in engagement f Another object is to provide such a heavy V duty clutchhavinga brakemember assoctated-iwi'th the driven member whereby the drivenj member is heldimmobile when the clutch is thrown out h bj t i to i provide a singlecon-. trOl to QPratebOhth driwng member and i the} brakemembergdthepartsflbeing so con-j w trol may be arranged in desiredlocation.

structedand arranged that said single con Numerous: other objects andadvantages of the invention will beapparent as it isibetter understood afrom the following description,

* which," taken in connection with theaccom i 'g d wi g disclosesapreferredemb'odir'n'ent thereof v p Referring to the drawings: p Tsideelevation of my Figurel is a r Fig. Qis anend elevation'ofthe sameFig.3 is an enlarged view similar to Fig. 2

- and with certain parts omitted for clearness;

and i 50 Figa'j t is across sectionthroughthe clutch takenalong'thelin'e Hot Fig. :3; "Fig.,:5, is a cross section throughtheclutch takenontheline5i-5oif Fig. 3; c

- T Figlifiis a1 fragmental cross section, similar to Fig. 5,,"showingcertain partsjin diiferent positions; 45

1 Fig. isa perspective the control linkage;

{-Fig. is is a planview of the gan sta holding plate associated withthecontrol handle,

"Fig. '9 is a perspective view of thesliding view ofaportiomof collarwhich actuates theengaging partsof the drivingmember. v 7 Referring nowto thedrawings-in more detail, the clutch shown is composed offa driven-I member 11 anda driving :member'12, both Q g .65 I a, 1 carried upon adrive shaft 13, which ez'zte'nds 7 through a'bearing 21 secured to aportion of the frame 59 of the machine. 1 Thedriven member consists of abody portion 14 which carries a chain sprocket '15 near'its mid len'gthandwhic'h has a drumf16 formed 'at one end.-

-The body p'o'rtion'l tis bushed to:the'd'riv'e shaft 13 by a bushing19, a washer collar 14? 7 drumportion 'l6'of thedriveri memberiis Lformed with a smooth cylindrical outer surface 17 whiohacts-as a,brakedrum surface. The inner portion of the drum is formed with teeth.or lugs 18, the space betweenythe teeth 1 being greater than thethickness of a tooth f Thedriving member 12'consists of a body 29 at oneend of Whichis a disc 32; upon which are formed two diametricallyopposite housings 32 positioned within the drum-l6 of i the drivenmember. a A key3l servesto positively connect the body29 or" the drivingmeina formed upon the body near its central porY-f tion, thespacebetween them forming agroove s6 v ber tothe drive shaft 13,a setsc'rew z3l: serv improved in which a two-piece yoke band 43 is seated iThis yoke band carries a pair ofstuds l posi tione'd diametricallyopposite each other and which serveflto connect the sliding collar to anengaging and releasing control tobe described later, Two arms 38 extendfrom diametricala ly opposite sides iof one end, each aim being 9 a adouble cle'vice provided with .clevic'e pin holes, 41 Toggle links 35are secured within the clevice arms'38 by ,clevice pins 41 and extend toandwalong'side ofthe housings 32 previously described. Y I 1 Dogs 33 arepositioned to slide within the housings 32 moving radially with respectto the drive shaft 13, each dog being connected to a pair of to glelinks 35 by means of a pin 36 extending t rough the links, the dog, andslots 37 formed in the side of the housing.

As the collar is moved toward the disc the the dogs are securely-lockedinto position As the collarismoved away. from the disc, the firstmovement unlocks the toggle links,'further movement retracting the dogsfromactive operative engagement with the teeth of the drum.

Movement of the collar 29 is accomplished b a yoke 47, the arms 46 ofwhich are dpros 44 vided with slots 45 which engage the stu on the yokeband 43 revieusly described, the yoke being pivoted y a bolt 49'to abracket 48 extending from a portion of the frame 59; The lever arm 51 ofthe yoke is secured to a clevice 52 by a clevice pin 53, the devicebeing attached to a rod 55. A second clevice 54 is attached to the otherend of the rod 55, nuts 56 beingprovided to permit adjustment. Thesecond clevice 54 is attached to the long arm ofs T-crank 27 by aclevice pin 57 and the T- crank is ivoted to a bracket 58 by a bolt 61,the brac extending from a portion of the frame 59. I V

The brake member associated with the drum 16 is composed of a'brakestrap 22 secured at one end to the frame, at 23, and formed to pasurround the surface 17 of the drum. A. o 24 is securely attached to theother eml of-the band, the yoke having a pair of arms 25 spaced a artand adapted to receive a brake rod 26. is rod 26 is secured at one endto the yoke by nuts 26, the other endof the rod being secured to aclevice formed on one of the short arms of the T-cranlr 27 by a devicepin 28.

The remaining short arm of the T-crank, which is also'formed with aclevice, is fast sued to a link 62 by a clevice pin 63. The link 62 isin turn fastened to one arm of a bell-crank 64 bya in 62, the bell-crankbeing pivoted to the bracket 58 by a bolt and sleeve 65. The other armof the bell-crank is pinned to a clevice 66 by a clevice pin 67, theclevice being mounted" upon one end of a rod 68'. Another clevice 69 ismounted upon the other end ofthe rod, nuts 71 being provided topermitadjustment. The clevice 69 issecured to acontrol lever 72 by a clevicepin 7 3, the lever being ivoted to the frame 59 by a bolt 74 and held ina slot 75in a guide bracket 76 secured to the frame 59. The slot 75 isformed with an enlarged portion 77 provided upon the teeth engaging dogsof the memben The toggle action of the arms 35 holds these parts inclutching relation and theinclined relation of the faces facilitatesengagement and disengagement.

The action of the clutch and brake mecha-' nisms, as actuatedby thecontrol lever, can best be explained from Figs. 1, 2 and 7. When thecontrol lever is in the position A, as shown in dotted lines in 2, theclutch is disenga ed and the brake is set.

Movement of the ever to the right causes the rod 68 to move to theright, rotating the bellcrank 64 in a clockwise direction (Fig. 1); Thispulls down the link 62 and rotates-the T-crank in a counter-clockwise(Figs.2and 7). The brake rod 26ismoved upward, releasing the brake bandfrom the drum and at the same time the rod 55 is moved, to the right,rotating the yoke lever 51 in a counter-clockwise direction, which movesthe slidin collar 39 to the left or towards the disc of e drivi member,e the dogs 33-as previous y ex ained. As the contro lever is moved to te left, all of the actions just described are reversed, releasing theclutch and settin thebrake.

I It is thou ht that t e invention and many of its atten ant advantageswill be understood from the foregoing description, and it will beapparent that variouschanges may be made in the form, construction and.ar-

rangement of the parts without departing from the spirit and scope ofthe invention or sacrificing all of its material advantages, the formhereinbefore described being merely a preferred embodiment thereof.

I claim: V

1. In a clutch mechanism, the combination of drivin and driven clutchingmembers, a said. mem er having a dentate inner surface,

the other said member having radially arranged projections extendingtoward said surface, radiall movin dogs carried by said projections am?adapt for engaging with the teeth of said surface, pins I through saidprojections and 'thmrgh dogs, and. means engaging said pins exteriallyof said projections for projecting and retracting said dogs.

I 2.-In-a clutch mechanism, the combination of driving and drivenclutching members, a said mem'herhaving a dentate inner surface,

theother said member havingfiradially ar-' ranged projections extendingtoward said surface, radially moving dogs carried by said projectionsand adapted for engaging with the teeth of said surface pins "extending;through said projections and through said' dogs, and means engaging saidpins exberially 7 of said projections for projecting and retracting saiddogs, said means comprising links passing over pivotal. centers intotoggle position in the projection of said dogs.

HILBERT E. SWANSON;

